1244063665 has 16 divisors (see below), whose sum is σ = 1692331200. Its totient is φ = 870340032.

The previous prime is 1244063651. The next prime is 1244063683. The reversal of 1244063665 is 5663604421.

It is a cyclic number.

It is not a de Polignac number, because 1244063665 - 2¹³ = 1244055473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502435 + ... + 504904.

It is an arithmetic number, because the mean of its divisors is an integer number (105770700).

Almost surely, 2^1244063665 is an apocalyptic number.

It is an amenable number.

1244063665 is a deficient number, since it is larger than the sum of its proper divisors (448267535).

1244063665 is a wasteful number, since it uses less digits than its factorization.

1244063665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007376.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 1244063665 is about 35271.2866932864. The cubic root of 1244063665 is about 1075.5093789326.

The spelling of 1244063665 in words is "one billion, two hundred forty-four million, sixty-three thousand, six hundred sixty-five".